const THREE = require('../../three.js');
const fflate = require('../fflate.min.js');

/**co
 * @author Kyle-Larson https://github.com/Kyle-Larson
 * @author Takahiro https://github.com/takahirox
 * @author Lewy Blue https://github.com/looeee
 *
 * Loader loads FBX file and generates Group representing FBX scene.
 * Requires FBX file to be >= 7.0 and in ASCII or >= 6400 in Binary format
 * Versions lower than this may load but will probably have errors
 *
 * Needs Support:
 *  Morph normals / blend shape normals
 *
 * FBX format references:
 * 	https://wiki.blender.org/index.php/User:Mont29/Foundation/FBX_File_Structure
 * 	http://help.autodesk.com/view/FBX/2017/ENU/?guid=__cpp_ref_index_html (C++ SDK reference)
 *
 * 	Binary format specification:
 *		https://code.blender.org/2013/08/fbx-binary-file-format-specification/
 */


/**
 * Loader loads FBX file and generates Group representing FBX scene.
 * Requires FBX file to be >= 7.0 and in ASCII or >= 6400 in Binary format
 * Versions lower than this may load but will probably have errors
 *
 * Needs Support:
 *  Morph normals / blend shape normals
 *
 * FBX format references:
 * 	https://wiki.blender.org/index.php/User:Mont29/Foundation/FBX_File_Structure
 * 	http://help.autodesk.com/view/FBX/2017/ENU/?guid=__cpp_ref_index_html (C++ SDK reference)
 *
 * 	Binary format specification:
 *		https://code.blender.org/2013/08/fbx-binary-file-format-specification/
 */


(function () {

	/**
 * THREE.Loader loads FBX file and generates THREE.Group representing FBX scene.
 * Requires FBX file to be >= 7.0 and in ASCII or >= 6400 in Binary format
 * Versions lower than this may load but will probably have errors
 *
 * Needs Support:
 *  Morph normals / blend shape normals
 *
 * FBX format references:
 * 	https://wiki.blender.org/index.php/User:Mont29/Foundation/FBX_File_Structure
 * 	http://help.autodesk.com/view/FBX/2017/ENU/?guid=__cpp_ref_index_html (C++ SDK reference)
 *
 * 	Binary format specification:
 *		https://code.blender.org/2013/08/fbx-binary-file-format-specification/
 */

	let fbxTree;
	let connections;
	let sceneGraph;

	class FBXLoader extends THREE.Loader {

		constructor(manager) {

			super(manager);

		}

		load(url, onLoad, onProgress, onError) {

			const scope = this;
			const path = scope.path === '' ? THREE.LoaderUtils.extractUrlBase(url) : scope.path;
			const loader = new THREE.FileLoader(this.manager);
			loader.setPath(scope.path);
			loader.setResponseType('arraybuffer');
			loader.setRequestHeader(scope.requestHeader);
			loader.setWithCredentials(scope.withCredentials);
			loader.load(url, function (buffer) {

				try {

					onLoad(scope.parse(buffer, path));

				} catch (e) {

					if (onError) {

						onError(e);

					} else {

						console.error(e);

					}

					scope.manager.itemError(url);

				}

			}, onProgress, onError);

		}

		parse(FBXBuffer, path) {

			if (isFbxFormatBinary(FBXBuffer)) {

				fbxTree = new BinaryParser().parse(FBXBuffer);

			} else {

				const FBXText = convertArrayBufferToString(FBXBuffer);

				if (!isFbxFormatASCII(FBXText)) {

					throw new Error('THREE.FBXLoader: Unknown format.');

				}

				if (getFbxVersion(FBXText) < 7000) {

					throw new Error('THREE.FBXLoader: FBX version not supported, FileVersion: ' + getFbxVersion(FBXText));

				}

				fbxTree = new TextParser().parse(FBXText);

			} // console.log( fbxTree );


			const textureLoader = new THREE.TextureLoader(this.manager).setPath(this.resourcePath || path).setCrossOrigin(this.crossOrigin);
			return new FBXTreeParser(textureLoader, this.manager).parse(fbxTree);

		}

	} // Parse the FBXTree object returned by the BinaryParser or TextParser and return a THREE.Group


	class FBXTreeParser {

		constructor(textureLoader, manager) {

			this.textureLoader = textureLoader;
			this.manager = manager;

		}

		parse() {

			connections = this.parseConnections();
			const images = this.parseImages();
			const textures = this.parseTextures(images);
			const materials = this.parseMaterials(textures);
			const deformers = this.parseDeformers();
			const geometryMap = new GeometryParser().parse(deformers);
			this.parseScene(deformers, geometryMap, materials);
			return sceneGraph;

		} // Parses FBXTree.Connections which holds parent-child connections between objects (e.g. material -> texture, model->geometry )
		// and details the connection type


		parseConnections() {

			const connectionMap = new Map();

			if ('Connections' in fbxTree) {

				const rawConnections = fbxTree.Connections.connections;
				rawConnections.forEach(function (rawConnection) {

					const fromID = rawConnection[0];
					const toID = rawConnection[1];
					const relationship = rawConnection[2];

					if (!connectionMap.has(fromID)) {

						connectionMap.set(fromID, {
							parents: [],
							children: []
						});

					}

					const parentRelationship = {
						ID: toID,
						relationship: relationship
					};
					connectionMap.get(fromID).parents.push(parentRelationship);

					if (!connectionMap.has(toID)) {

						connectionMap.set(toID, {
							parents: [],
							children: []
						});

					}

					const childRelationship = {
						ID: fromID,
						relationship: relationship
					};
					connectionMap.get(toID).children.push(childRelationship);

				});

			}

			return connectionMap;

		} // Parse FBXTree.Objects.Video for embedded image data
		// These images are connected to textures in FBXTree.Objects.Textures
		// via FBXTree.Connections.


		parseImages() {

			const images = {};
			const blobs = {};

			if ('Video' in fbxTree.Objects) {

				const videoNodes = fbxTree.Objects.Video;

				for (const nodeID in videoNodes) {

					const videoNode = videoNodes[nodeID];
					const id = parseInt(nodeID);
					images[id] = videoNode.RelativeFilename || videoNode.Filename; // raw image data is in videoNode.Content

					if ('Content' in videoNode) {

						const arrayBufferContent = videoNode.Content instanceof ArrayBuffer && videoNode.Content.byteLength > 0;
						const base64Content = typeof videoNode.Content === 'string' && videoNode.Content !== '';

						if (arrayBufferContent || base64Content) {

							const image = this.parseImage(videoNodes[nodeID]);
							blobs[videoNode.RelativeFilename || videoNode.Filename] = image;

						}

					}

				}

			}

			for (const id in images) {

				const filename = images[id];
				if (blobs[filename] !== undefined) images[id] = blobs[filename]; else images[id] = images[id].split('\\').pop();

			}

			return images;

		} // Parse embedded image data in FBXTree.Video.Content


		parseImage(videoNode) {

			const content = videoNode.Content;
			const fileName = videoNode.RelativeFilename || videoNode.Filename;
			const extension = fileName.slice(fileName.lastIndexOf('.') + 1).toLowerCase();
			let type;

			switch (extension) {

				case 'bmp':
					type = 'image/bmp';
					break;

				case 'jpg':
				case 'jpeg':
					type = 'image/jpeg';
					break;

				case 'png':
					type = 'image/png';
					break;

				case 'tif':
					type = 'image/tiff';
					break;

				case 'tga':
					if (this.manager.getHandler('.tga') === null) {

						console.warn('FBXLoader: TGA loader not found, skipping ', fileName);

					}

					type = 'image/tga';
					break;

				default:
					console.warn('FBXLoader: Image type "' + extension + '" is not supported.');
					return;

			}

			if (typeof content === 'string') {

				// ASCII format
				return 'data:' + type + ';base64,' + content;

			} else {

				// Binary Format
				const array = new Uint8Array(content);
				return window.URL.createObjectURL(new Blob([array], {
					type: type
				}));

			}

		} // Parse nodes in FBXTree.Objects.Texture
		// These contain details such as UV scaling, cropping, rotation etc and are connected
		// to images in FBXTree.Objects.Video


		parseTextures(images) {

			const textureMap = new Map();

			if ('Texture' in fbxTree.Objects) {

				const textureNodes = fbxTree.Objects.Texture;

				for (const nodeID in textureNodes) {

					const texture = this.parseTexture(textureNodes[nodeID], images);
					textureMap.set(parseInt(nodeID), texture);

				}

			}

			return textureMap;

		} // Parse individual node in FBXTree.Objects.Texture


		parseTexture(textureNode, images) {

			const texture = this.loadTexture(textureNode, images);
			texture.ID = textureNode.id;
			texture.name = textureNode.attrName;
			const wrapModeU = textureNode.WrapModeU;
			const wrapModeV = textureNode.WrapModeV;
			const valueU = wrapModeU !== undefined ? wrapModeU.value : 0;
			const valueV = wrapModeV !== undefined ? wrapModeV.value : 0; // http://download.autodesk.com/us/fbx/SDKdocs/FBX_SDK_Help/files/fbxsdkref/class_k_fbx_texture.html#889640e63e2e681259ea81061b85143a
			// 0: repeat(default), 1: clamp

			texture.wrapS = valueU === 0 ? THREE.RepeatWrapping : THREE.ClampToEdgeWrapping;
			texture.wrapT = valueV === 0 ? THREE.RepeatWrapping : THREE.ClampToEdgeWrapping;

			if ('Scaling' in textureNode) {

				const values = textureNode.Scaling.value;
				texture.repeat.x = values[0];
				texture.repeat.y = values[1];

			}

			return texture;

		} // load a texture specified as a blob or data URI, or via an external URL using THREE.TextureLoader


		loadTexture(textureNode, images) {

			let fileName;
			const currentPath = this.textureLoader.path;
			const children = connections.get(textureNode.id).children;

			if (children !== undefined && children.length > 0 && images[children[0].ID] !== undefined) {

				fileName = images[children[0].ID];

				if (fileName.indexOf('blob:') === 0 || fileName.indexOf('data:') === 0) {

					this.textureLoader.setPath(undefined);

				}

			}

			let texture;
			const extension = textureNode.FileName.slice(- 3).toLowerCase();

			if (extension === 'tga') {

				const loader = this.manager.getHandler('.tga');

				if (loader === null) {

					console.warn('FBXLoader: TGA loader not found, creating placeholder texture for', textureNode.RelativeFilename);
					texture = new THREE.Texture();

				} else {

					loader.setPath(this.textureLoader.path);
					texture = loader.load(fileName);

				}

			} else if (extension === 'psd') {

				console.warn('FBXLoader: PSD textures are not supported, creating placeholder texture for', textureNode.RelativeFilename);
				texture = new THREE.Texture();

			} else {

				texture = this.textureLoader.load(fileName);

			}

			this.textureLoader.setPath(currentPath);
			return texture;

		} // Parse nodes in FBXTree.Objects.Material


		parseMaterials(textureMap) {

			const materialMap = new Map();

			if ('Material' in fbxTree.Objects) {

				const materialNodes = fbxTree.Objects.Material;

				for (const nodeID in materialNodes) {

					const material = this.parseMaterial(materialNodes[nodeID], textureMap);
					if (material !== null) materialMap.set(parseInt(nodeID), material);

				}

			}

			return materialMap;

		} // Parse single node in FBXTree.Objects.Material
		// Materials are connected to texture maps in FBXTree.Objects.Textures
		// FBX format currently only supports Lambert and Phong shading models


		parseMaterial(materialNode, textureMap) {

			const ID = materialNode.id;
			const name = materialNode.attrName;
			let type = materialNode.ShadingModel; // Case where FBX wraps shading model in property object.

			if (typeof type === 'object') {

				type = type.value;

			} // Ignore unused materials which don't have any connections.


			if (!connections.has(ID)) return null;
			const parameters = this.parseParameters(materialNode, textureMap, ID);
			let material;

			switch (type.toLowerCase()) {

				case 'phong':
					material = new THREE.MeshPhongMaterial();
					break;

				case 'lambert':
					material = new THREE.MeshLambertMaterial();
					break;

				default:
					console.warn('THREE.FBXLoader: unknown material type "%s". Defaulting to THREE.MeshPhongMaterial.', type);
					material = new THREE.MeshPhongMaterial();
					break;

			}

			material.setValues(parameters);
			material.name = name;
			return material;

		} // Parse FBX material and return parameters suitable for a three.js material
		// Also parse the texture map and return any textures associated with the material


		parseParameters(materialNode, textureMap, ID) {

			const parameters = {};

			if (materialNode.BumpFactor) {

				parameters.bumpScale = materialNode.BumpFactor.value;

			}

			if (materialNode.Diffuse) {

				parameters.color = new THREE.Color().fromArray(materialNode.Diffuse.value);

			} else if (materialNode.DiffuseColor && (materialNode.DiffuseColor.type === 'Color' || materialNode.DiffuseColor.type === 'ColorRGB')) {

				// The blender exporter exports diffuse here instead of in materialNode.Diffuse
				parameters.color = new THREE.Color().fromArray(materialNode.DiffuseColor.value);

			}

			if (materialNode.DisplacementFactor) {

				parameters.displacementScale = materialNode.DisplacementFactor.value;

			}

			if (materialNode.Emissive) {

				parameters.emissive = new THREE.Color().fromArray(materialNode.Emissive.value);

			} else if (materialNode.EmissiveColor && (materialNode.EmissiveColor.type === 'Color' || materialNode.EmissiveColor.type === 'ColorRGB')) {

				// The blender exporter exports emissive color here instead of in materialNode.Emissive
				parameters.emissive = new THREE.Color().fromArray(materialNode.EmissiveColor.value);

			}

			if (materialNode.EmissiveFactor) {

				parameters.emissiveIntensity = parseFloat(materialNode.EmissiveFactor.value);

			}

			if (materialNode.Opacity) {

				parameters.opacity = parseFloat(materialNode.Opacity.value);

			}

			if (parameters.opacity < 1.0) {

				parameters.transparent = true;

			}

			if (materialNode.ReflectionFactor) {

				parameters.reflectivity = materialNode.ReflectionFactor.value;

			}

			if (materialNode.Shininess) {

				parameters.shininess = materialNode.Shininess.value;

			}

			if (materialNode.Specular) {

				parameters.specular = new THREE.Color().fromArray(materialNode.Specular.value);

			} else if (materialNode.SpecularColor && materialNode.SpecularColor.type === 'Color') {

				// The blender exporter exports specular color here instead of in materialNode.Specular
				parameters.specular = new THREE.Color().fromArray(materialNode.SpecularColor.value);

			}

			const scope = this;
			connections.get(ID).children.forEach(function (child) {

				const type = child.relationship;

				switch (type) {

					case 'Bump':
						parameters.bumpMap = scope.getTexture(textureMap, child.ID);
						break;

					case 'Maya|TEX_ao_map':
						parameters.aoMap = scope.getTexture(textureMap, child.ID);
						break;

					case 'DiffuseColor':
					case 'Maya|TEX_color_map':
						parameters.map = scope.getTexture(textureMap, child.ID);

						if (parameters.map !== undefined) {

							parameters.map.encoding = THREE.sRGBEncoding;

						}

						break;

					case 'DisplacementColor':
						parameters.displacementMap = scope.getTexture(textureMap, child.ID);
						break;

					case 'EmissiveColor':
						parameters.emissiveMap = scope.getTexture(textureMap, child.ID);

						if (parameters.emissiveMap !== undefined) {

							parameters.emissiveMap.encoding = THREE.sRGBEncoding;

						}

						break;

					case 'NormalMap':
					case 'Maya|TEX_normal_map':
						parameters.normalMap = scope.getTexture(textureMap, child.ID);
						break;

					case 'ReflectionColor':
						parameters.envMap = scope.getTexture(textureMap, child.ID);

						if (parameters.envMap !== undefined) {

							parameters.envMap.mapping = THREE.EquirectangularReflectionMapping;
							parameters.envMap.encoding = THREE.sRGBEncoding;

						}

						break;

					case 'SpecularColor':
						parameters.specularMap = scope.getTexture(textureMap, child.ID);

						if (parameters.specularMap !== undefined) {

							parameters.specularMap.encoding = THREE.sRGBEncoding;

						}

						break;

					case 'TransparentColor':
					case 'TransparencyFactor':
						parameters.alphaMap = scope.getTexture(textureMap, child.ID);
						parameters.transparent = true;
						break;

					case 'AmbientColor':
					case 'ShininessExponent': // AKA glossiness map

					case 'SpecularFactor': // AKA specularLevel

					case 'VectorDisplacementColor': // NOTE: Seems to be a copy of DisplacementColor

					default:
						console.warn('THREE.FBXLoader: %s map is not supported in three.js, skipping texture.', type);
						break;

				}

			});
			return parameters;

		} // get a texture from the textureMap for use by a material.


		getTexture(textureMap, id) {

			// if the texture is a layered texture, just use the first layer and issue a warning
			if ('LayeredTexture' in fbxTree.Objects && id in fbxTree.Objects.LayeredTexture) {

				console.warn('THREE.FBXLoader: layered textures are not supported in three.js. Discarding all but first layer.');
				id = connections.get(id).children[0].ID;

			}

			return textureMap.get(id);

		} // Parse nodes in FBXTree.Objects.Deformer
		// Deformer node can contain skinning or Vertex Cache animation data, however only skinning is supported here
		// Generates map of THREE.Skeleton-like objects for use later when generating and binding skeletons.


		parseDeformers() {

			const skeletons = {};
			const morphTargets = {};

			if ('Deformer' in fbxTree.Objects) {

				const DeformerNodes = fbxTree.Objects.Deformer;

				for (const nodeID in DeformerNodes) {

					const deformerNode = DeformerNodes[nodeID];
					const relationships = connections.get(parseInt(nodeID));

					if (deformerNode.attrType === 'Skin') {

						const skeleton = this.parseSkeleton(relationships, DeformerNodes);
						skeleton.ID = nodeID;
						if (relationships.parents.length > 1) console.warn('THREE.FBXLoader: skeleton attached to more than one geometry is not supported.');
						skeleton.geometryID = relationships.parents[0].ID;
						skeletons[nodeID] = skeleton;

					} else if (deformerNode.attrType === 'BlendShape') {

						const morphTarget = {
							id: nodeID
						};
						morphTarget.rawTargets = this.parseMorphTargets(relationships, DeformerNodes);
						morphTarget.id = nodeID;
						if (relationships.parents.length > 1) console.warn('THREE.FBXLoader: morph target attached to more than one geometry is not supported.');
						morphTargets[nodeID] = morphTarget;

					}

				}

			}

			return {
				skeletons: skeletons,
				morphTargets: morphTargets
			};

		} // Parse single nodes in FBXTree.Objects.Deformer
		// The top level skeleton node has type 'Skin' and sub nodes have type 'Cluster'
		// Each skin node represents a skeleton and each cluster node represents a bone


		parseSkeleton(relationships, deformerNodes) {

			const rawBones = [];
			relationships.children.forEach(function (child) {

				const boneNode = deformerNodes[child.ID];
				if (boneNode.attrType !== 'Cluster') return;
				const rawBone = {
					ID: child.ID,
					indices: [],
					weights: [],
					transformLink: new THREE.Matrix4().fromArray(boneNode.TransformLink.a) // transform: new THREE.Matrix4().fromArray( boneNode.Transform.a ),
					// linkMode: boneNode.Mode,

				};

				if ('Indexes' in boneNode) {

					rawBone.indices = boneNode.Indexes.a;
					rawBone.weights = boneNode.Weights.a;

				}

				rawBones.push(rawBone);

			});
			return {
				rawBones: rawBones,
				bones: []
			};

		} // The top level morph deformer node has type "BlendShape" and sub nodes have type "BlendShapeChannel"


		parseMorphTargets(relationships, deformerNodes) {

			const rawMorphTargets = [];

			for (let i = 0; i < relationships.children.length; i++) {

				const child = relationships.children[i];
				const morphTargetNode = deformerNodes[child.ID];
				const rawMorphTarget = {
					name: morphTargetNode.attrName,
					initialWeight: morphTargetNode.DeformPercent,
					id: morphTargetNode.id,
					fullWeights: morphTargetNode.FullWeights.a
				};
				if (morphTargetNode.attrType !== 'BlendShapeChannel') return;
				rawMorphTarget.geoID = connections.get(parseInt(child.ID)).children.filter(function (child) {

					return child.relationship === undefined;

				})[0].ID;
				rawMorphTargets.push(rawMorphTarget);

			}

			return rawMorphTargets;

		} // create the main THREE.Group() to be returned by the loader


		parseScene(deformers, geometryMap, materialMap) {

			sceneGraph = new THREE.Group();
			const modelMap = this.parseModels(deformers.skeletons, geometryMap, materialMap);
			const modelNodes = fbxTree.Objects.Model;
			const scope = this;
			modelMap.forEach(function (model) {

				const modelNode = modelNodes[model.ID];
				scope.setLookAtProperties(model, modelNode);
				const parentConnections = connections.get(model.ID).parents;
				parentConnections.forEach(function (connection) {

					const parent = modelMap.get(connection.ID);
					if (parent !== undefined) parent.add(model);

				});

				if (model.parent === null) {

					sceneGraph.add(model);

				}

			});
			this.bindSkeleton(deformers.skeletons, geometryMap, modelMap);
			this.createAmbientLight();
			sceneGraph.traverse(function (node) {

				if (node.userData.transformData) {

					if (node.parent) {

						node.userData.transformData.parentMatrix = node.parent.matrix;
						node.userData.transformData.parentMatrixWorld = node.parent.matrixWorld;

					}

					const transform = generateTransform(node.userData.transformData);
					node.applyMatrix4(transform);
					node.updateWorldMatrix();

				}

			});
			const animations = new AnimationParser().parse(); // if all the models where already combined in a single group, just return that

			if (sceneGraph.children.length === 1 && sceneGraph.children[0].isGroup) {

				sceneGraph.children[0].animations = animations;
				sceneGraph = sceneGraph.children[0];

			}

			sceneGraph.animations = animations;

		} // parse nodes in FBXTree.Objects.Model


		parseModels(skeletons, geometryMap, materialMap) {

			const modelMap = new Map();
			const modelNodes = fbxTree.Objects.Model;

			for (const nodeID in modelNodes) {

				const id = parseInt(nodeID);
				const node = modelNodes[nodeID];
				const relationships = connections.get(id);
				let model = this.buildSkeleton(relationships, skeletons, id, node.attrName);

				if (!model) {

					switch (node.attrType) {

						case 'Camera':
							model = this.createCamera(relationships);
							break;

						case 'Light':
							model = this.createLight(relationships);
							break;

						case 'Mesh':
							model = this.createMesh(relationships, geometryMap, materialMap);
							break;

						case 'NurbsCurve':
							model = this.createCurve(relationships, geometryMap);
							break;

						case 'LimbNode':
						case 'Root':
							model = new THREE.Bone();
							break;

						case 'Null':
						default:
							model = new THREE.Group();
							break;

					}

					model.name = node.attrName ? THREE.PropertyBinding.sanitizeNodeName(node.attrName) : '';
					model.ID = id;

				}

				this.getTransformData(model, node);
				modelMap.set(id, model);

			}

			return modelMap;

		}

		buildSkeleton(relationships, skeletons, id, name) {

			let bone = null;
			relationships.parents.forEach(function (parent) {

				for (const ID in skeletons) {

					const skeleton = skeletons[ID];
					skeleton.rawBones.forEach(function (rawBone, i) {

						if (rawBone.ID === parent.ID) {

							const subBone = bone;
							bone = new THREE.Bone();
							bone.matrixWorld.copy(rawBone.transformLink); // set name and id here - otherwise in cases where "subBone" is created it will not have a name / id

							bone.name = name ? THREE.PropertyBinding.sanitizeNodeName(name) : '';
							bone.ID = id;
							skeleton.bones[i] = bone; // In cases where a bone is shared between multiple meshes
							// duplicate the bone here and and it as a child of the first bone

							if (subBone !== null) {

								bone.add(subBone);

							}

						}

					});

				}

			});
			return bone;

		} // create a THREE.PerspectiveCamera or THREE.OrthographicCamera


		createCamera(relationships) {

			let model;
			let cameraAttribute;
			relationships.children.forEach(function (child) {

				const attr = fbxTree.Objects.NodeAttribute[child.ID];

				if (attr !== undefined) {

					cameraAttribute = attr;

				}

			});

			if (cameraAttribute === undefined) {

				model = new THREE.Object3D();

			} else {

				let type = 0;

				if (cameraAttribute.CameraProjectionType !== undefined && cameraAttribute.CameraProjectionType.value === 1) {

					type = 1;

				}

				let nearClippingPlane = 1;

				if (cameraAttribute.NearPlane !== undefined) {

					nearClippingPlane = cameraAttribute.NearPlane.value / 1000;

				}

				let farClippingPlane = 1000;

				if (cameraAttribute.FarPlane !== undefined) {

					farClippingPlane = cameraAttribute.FarPlane.value / 1000;

				}

				let width = window.innerWidth;
				let height = window.innerHeight;

				if (cameraAttribute.AspectWidth !== undefined && cameraAttribute.AspectHeight !== undefined) {

					width = cameraAttribute.AspectWidth.value;
					height = cameraAttribute.AspectHeight.value;

				}

				const aspect = width / height;
				let fov = 45;

				if (cameraAttribute.FieldOfView !== undefined) {

					fov = cameraAttribute.FieldOfView.value;

				}

				const focalLength = cameraAttribute.FocalLength ? cameraAttribute.FocalLength.value : null;

				switch (type) {

					case 0:
						// Perspective
						model = new THREE.PerspectiveCamera(fov, aspect, nearClippingPlane, farClippingPlane);
						if (focalLength !== null) model.setFocalLength(focalLength);
						break;

					case 1:
						// Orthographic
						model = new THREE.OrthographicCamera(- width / 2, width / 2, height / 2, - height / 2, nearClippingPlane, farClippingPlane);
						break;

					default:
						console.warn('THREE.FBXLoader: Unknown camera type ' + type + '.');
						model = new THREE.Object3D();
						break;

				}

			}

			return model;

		} // Create a THREE.DirectionalLight, THREE.PointLight or THREE.SpotLight


		createLight(relationships) {

			let model;
			let lightAttribute;
			relationships.children.forEach(function (child) {

				const attr = fbxTree.Objects.NodeAttribute[child.ID];

				if (attr !== undefined) {

					lightAttribute = attr;

				}

			});

			if (lightAttribute === undefined) {

				model = new THREE.Object3D();

			} else {

				let type; // LightType can be undefined for Point lights

				if (lightAttribute.LightType === undefined) {

					type = 0;

				} else {

					type = lightAttribute.LightType.value;

				}

				let color = 0xffffff;

				if (lightAttribute.Color !== undefined) {

					color = new THREE.Color().fromArray(lightAttribute.Color.value);

				}

				let intensity = lightAttribute.Intensity === undefined ? 1 : lightAttribute.Intensity.value / 100; // light disabled

				if (lightAttribute.CastLightOnObject !== undefined && lightAttribute.CastLightOnObject.value === 0) {

					intensity = 0;

				}

				let distance = 0;

				if (lightAttribute.FarAttenuationEnd !== undefined) {

					if (lightAttribute.EnableFarAttenuation !== undefined && lightAttribute.EnableFarAttenuation.value === 0) {

						distance = 0;

					} else {

						distance = lightAttribute.FarAttenuationEnd.value;

					}

				} // TODO: could this be calculated linearly from FarAttenuationStart to FarAttenuationEnd?


				const decay = 1;

				switch (type) {

					case 0:
						// Point
						model = new THREE.PointLight(color, intensity, distance, decay);
						break;

					case 1:
						// Directional
						model = new THREE.DirectionalLight(color, intensity);
						break;

					case 2:
						// Spot
						let angle = Math.PI / 3;

						if (lightAttribute.InnerAngle !== undefined) {

							angle = THREE.MathUtils.degToRad(lightAttribute.InnerAngle.value);

						}

						let penumbra = 0;

						if (lightAttribute.OuterAngle !== undefined) {

							// TODO: this is not correct - FBX calculates outer and inner angle in degrees
							// with OuterAngle > InnerAngle && OuterAngle <= Math.PI
							// while three.js uses a penumbra between (0, 1) to attenuate the inner angle
							penumbra = THREE.MathUtils.degToRad(lightAttribute.OuterAngle.value);
							penumbra = Math.max(penumbra, 1);

						}

						model = new THREE.SpotLight(color, intensity, distance, angle, penumbra, decay);
						break;

					default:
						console.warn('THREE.FBXLoader: Unknown light type ' + lightAttribute.LightType.value + ', defaulting to a THREE.PointLight.');
						model = new THREE.PointLight(color, intensity);
						break;

				}

				if (lightAttribute.CastShadows !== undefined && lightAttribute.CastShadows.value === 1) {

					model.castShadow = true;

				}

			}

			return model;

		}

		createMesh(relationships, geometryMap, materialMap) {

			let model;
			let geometry = null;
			let material = null;
			const materials = []; // get geometry and materials(s) from connections

			relationships.children.forEach(function (child) {

				if (geometryMap.has(child.ID)) {

					geometry = geometryMap.get(child.ID);

				}

				if (materialMap.has(child.ID)) {

					materials.push(materialMap.get(child.ID));

				}

			});

			if (materials.length > 1) {

				material = materials;

			} else if (materials.length > 0) {

				material = materials[0];

			} else {

				material = new THREE.MeshPhongMaterial({
					color: 0xcccccc
				});
				materials.push(material);

			}

			if ('color' in geometry.attributes) {

				materials.forEach(function (material) {

					material.vertexColors = true;

				});

			}

			if (geometry.FBX_Deformer) {

				model = new THREE.SkinnedMesh(geometry, material);
				model.normalizeSkinWeights();

			} else {

				model = new THREE.Mesh(geometry, material);

			}

			return model;

		}

		createCurve(relationships, geometryMap) {

			const geometry = relationships.children.reduce(function (geo, child) {

				if (geometryMap.has(child.ID)) geo = geometryMap.get(child.ID);
				return geo;

			}, null); // FBX does not list materials for Nurbs lines, so we'll just put our own in here.

			const material = new THREE.LineBasicMaterial({
				color: 0x3300ff,
				linewidth: 1
			});
			return new THREE.Line(geometry, material);

		} // parse the model node for transform data


		getTransformData(model, modelNode) {

			const transformData = {};
			if ('InheritType' in modelNode) transformData.inheritType = parseInt(modelNode.InheritType.value);
			if ('RotationOrder' in modelNode) transformData.eulerOrder = getEulerOrder(modelNode.RotationOrder.value); else transformData.eulerOrder = 'ZYX';
			if ('Lcl_Translation' in modelNode) transformData.translation = modelNode.Lcl_Translation.value;
			if ('PreRotation' in modelNode) transformData.preRotation = modelNode.PreRotation.value;
			if ('Lcl_Rotation' in modelNode) transformData.rotation = modelNode.Lcl_Rotation.value;
			if ('PostRotation' in modelNode) transformData.postRotation = modelNode.PostRotation.value;
			if ('Lcl_Scaling' in modelNode) transformData.scale = modelNode.Lcl_Scaling.value;
			if ('ScalingOffset' in modelNode) transformData.scalingOffset = modelNode.ScalingOffset.value;
			if ('ScalingPivot' in modelNode) transformData.scalingPivot = modelNode.ScalingPivot.value;
			if ('RotationOffset' in modelNode) transformData.rotationOffset = modelNode.RotationOffset.value;
			if ('RotationPivot' in modelNode) transformData.rotationPivot = modelNode.RotationPivot.value;
			model.userData.transformData = transformData;

		}

		setLookAtProperties(model, modelNode) {

			if ('LookAtProperty' in modelNode) {

				const children = connections.get(model.ID).children;
				children.forEach(function (child) {

					if (child.relationship === 'LookAtProperty') {

						const lookAtTarget = fbxTree.Objects.Model[child.ID];

						if ('Lcl_Translation' in lookAtTarget) {

							const pos = lookAtTarget.Lcl_Translation.value; // THREE.DirectionalLight, THREE.SpotLight

							if (model.target !== undefined) {

								model.target.position.fromArray(pos);
								sceneGraph.add(model.target);

							} else {

								// Cameras and other Object3Ds
								model.lookAt(new THREE.Vector3().fromArray(pos));

							}

						}

					}

				});

			}

		}

		bindSkeleton(skeletons, geometryMap, modelMap) {

			const bindMatrices = this.parsePoseNodes();

			for (const ID in skeletons) {

				const skeleton = skeletons[ID];
				const parents = connections.get(parseInt(skeleton.ID)).parents;
				parents.forEach(function (parent) {

					if (geometryMap.has(parent.ID)) {

						const geoID = parent.ID;
						const geoRelationships = connections.get(geoID);
						geoRelationships.parents.forEach(function (geoConnParent) {

							if (modelMap.has(geoConnParent.ID)) {

								const model = modelMap.get(geoConnParent.ID);
								model.bind(new THREE.Skeleton(skeleton.bones), bindMatrices[geoConnParent.ID]);

							}

						});

					}

				});

			}

		}

		parsePoseNodes() {

			const bindMatrices = {};

			if ('Pose' in fbxTree.Objects) {

				const BindPoseNode = fbxTree.Objects.Pose;

				for (const nodeID in BindPoseNode) {

					if (BindPoseNode[nodeID].attrType === 'BindPose') {

						const poseNodes = BindPoseNode[nodeID].PoseNode;

						if (Array.isArray(poseNodes)) {

							poseNodes.forEach(function (poseNode) {

								bindMatrices[poseNode.Node] = new THREE.Matrix4().fromArray(poseNode.Matrix.a);

							});

						} else {

							bindMatrices[poseNodes.Node] = new THREE.Matrix4().fromArray(poseNodes.Matrix.a);

						}

					}

				}

			}

			return bindMatrices;

		} // Parse ambient color in FBXTree.GlobalSettings - if it's not set to black (default), create an ambient light


		createAmbientLight() {

			if ('GlobalSettings' in fbxTree && 'AmbientColor' in fbxTree.GlobalSettings) {

				const ambientColor = fbxTree.GlobalSettings.AmbientColor.value;
				const r = ambientColor[0];
				const g = ambientColor[1];
				const b = ambientColor[2];

				if (r !== 0 || g !== 0 || b !== 0) {

					const color = new THREE.Color(r, g, b);
					sceneGraph.add(new THREE.AmbientLight(color, 1));

				}

			}

		}

	} // parse Geometry data from FBXTree and return map of BufferGeometries


	class GeometryParser {

		// Parse nodes in FBXTree.Objects.Geometry
		parse(deformers) {

			const geometryMap = new Map();

			if ('Geometry' in fbxTree.Objects) {

				const geoNodes = fbxTree.Objects.Geometry;

				for (const nodeID in geoNodes) {

					const relationships = connections.get(parseInt(nodeID));
					const geo = this.parseGeometry(relationships, geoNodes[nodeID], deformers);
					geometryMap.set(parseInt(nodeID), geo);

				}

			}

			return geometryMap;

		} // Parse single node in FBXTree.Objects.Geometry


		parseGeometry(relationships, geoNode, deformers) {

			switch (geoNode.attrType) {

				case 'Mesh':
					return this.parseMeshGeometry(relationships, geoNode, deformers);
					break;

				case 'NurbsCurve':
					return this.parseNurbsGeometry(geoNode);
					break;

			}

		} // Parse single node mesh geometry in FBXTree.Objects.Geometry


		parseMeshGeometry(relationships, geoNode, deformers) {

			const skeletons = deformers.skeletons;
			const morphTargets = [];
			const modelNodes = relationships.parents.map(function (parent) {

				return fbxTree.Objects.Model[parent.ID];

			}); // don't create geometry if it is not associated with any models

			if (modelNodes.length === 0) return;
			const skeleton = relationships.children.reduce(function (skeleton, child) {

				if (skeletons[child.ID] !== undefined) skeleton = skeletons[child.ID];
				return skeleton;

			}, null);
			relationships.children.forEach(function (child) {

				if (deformers.morphTargets[child.ID] !== undefined) {

					morphTargets.push(deformers.morphTargets[child.ID]);

				}

			}); // Assume one model and get the preRotation from that
			// if there is more than one model associated with the geometry this may cause problems

			const modelNode = modelNodes[0];
			const transformData = {};
			if ('RotationOrder' in modelNode) transformData.eulerOrder = getEulerOrder(modelNode.RotationOrder.value);
			if ('InheritType' in modelNode) transformData.inheritType = parseInt(modelNode.InheritType.value);
			if ('GeometricTranslation' in modelNode) transformData.translation = modelNode.GeometricTranslation.value;
			if ('GeometricRotation' in modelNode) transformData.rotation = modelNode.GeometricRotation.value;
			if ('GeometricScaling' in modelNode) transformData.scale = modelNode.GeometricScaling.value;
			const transform = generateTransform(transformData);
			return this.genGeometry(geoNode, skeleton, morphTargets, transform);

		} // Generate a THREE.BufferGeometry from a node in FBXTree.Objects.Geometry


		genGeometry(geoNode, skeleton, morphTargets, preTransform) {

			const geo = new THREE.BufferGeometry();
			if (geoNode.attrName) geo.name = geoNode.attrName;
			const geoInfo = this.parseGeoNode(geoNode, skeleton);
			const buffers = this.genBuffers(geoInfo);
			const positionAttribute = new THREE.Float32BufferAttribute(buffers.vertex, 3);
			positionAttribute.applyMatrix4(preTransform);
			geo.setAttribute('position', positionAttribute);

			if (buffers.colors.length > 0) {

				geo.setAttribute('color', new THREE.Float32BufferAttribute(buffers.colors, 3));

			}

			if (skeleton) {

				geo.setAttribute('skinIndex', new THREE.Uint16BufferAttribute(buffers.weightsIndices, 4));
				geo.setAttribute('skinWeight', new THREE.Float32BufferAttribute(buffers.vertexWeights, 4)); // used later to bind the skeleton to the model

				geo.FBX_Deformer = skeleton;

			}

			if (buffers.normal.length > 0) {

				const normalMatrix = new THREE.Matrix3().getNormalMatrix(preTransform);
				const normalAttribute = new THREE.Float32BufferAttribute(buffers.normal, 3);
				normalAttribute.applyNormalMatrix(normalMatrix);
				geo.setAttribute('normal', normalAttribute);

			}

			buffers.uvs.forEach(function (uvBuffer, i) {

				// subsequent uv buffers are called 'uv1', 'uv2', ...
				let name = 'uv' + (i + 1).toString(); // the first uv buffer is just called 'uv'

				if (i === 0) {

					name = 'uv';

				}

				geo.setAttribute(name, new THREE.Float32BufferAttribute(buffers.uvs[i], 2));

			});

			if (geoInfo.material && geoInfo.material.mappingType !== 'AllSame') {

				// Convert the material indices of each vertex into rendering groups on the geometry.
				let prevMaterialIndex = buffers.materialIndex[0];
				let startIndex = 0;
				buffers.materialIndex.forEach(function (currentIndex, i) {

					if (currentIndex !== prevMaterialIndex) {

						geo.addGroup(startIndex, i - startIndex, prevMaterialIndex);
						prevMaterialIndex = currentIndex;
						startIndex = i;

					}

				}); // the loop above doesn't add the last group, do that here.

				if (geo.groups.length > 0) {

					const lastGroup = geo.groups[geo.groups.length - 1];
					const lastIndex = lastGroup.start + lastGroup.count;

					if (lastIndex !== buffers.materialIndex.length) {

						geo.addGroup(lastIndex, buffers.materialIndex.length - lastIndex, prevMaterialIndex);

					}

				} // case where there are multiple materials but the whole geometry is only
				// using one of them


				if (geo.groups.length === 0) {

					geo.addGroup(0, buffers.materialIndex.length, buffers.materialIndex[0]);

				}

			}

			this.addMorphTargets(geo, geoNode, morphTargets, preTransform);
			return geo;

		}

		parseGeoNode(geoNode, skeleton) {

			const geoInfo = {};
			geoInfo.vertexPositions = geoNode.Vertices !== undefined ? geoNode.Vertices.a : [];
			geoInfo.vertexIndices = geoNode.PolygonVertexIndex !== undefined ? geoNode.PolygonVertexIndex.a : [];

			if (geoNode.LayerElementColor) {

				geoInfo.color = this.parseVertexColors(geoNode.LayerElementColor[0]);

			}

			if (geoNode.LayerElementMaterial) {

				geoInfo.material = this.parseMaterialIndices(geoNode.LayerElementMaterial[0]);

			}

			if (geoNode.LayerElementNormal) {

				geoInfo.normal = this.parseNormals(geoNode.LayerElementNormal[0]);

			}

			if (geoNode.LayerElementUV) {

				geoInfo.uv = [];
				let i = 0;

				while (geoNode.LayerElementUV[i]) {

					if (geoNode.LayerElementUV[i].UV) {

						geoInfo.uv.push(this.parseUVs(geoNode.LayerElementUV[i]));

					}

					i++;

				}

			}

			geoInfo.weightTable = {};

			if (skeleton !== null) {

				geoInfo.skeleton = skeleton;
				skeleton.rawBones.forEach(function (rawBone, i) {

					// loop over the bone's vertex indices and weights
					rawBone.indices.forEach(function (index, j) {

						if (geoInfo.weightTable[index] === undefined) geoInfo.weightTable[index] = [];
						geoInfo.weightTable[index].push({
							id: i,
							weight: rawBone.weights[j]
						});

					});

				});

			}

			return geoInfo;

		}

		genBuffers(geoInfo) {

			const buffers = {
				vertex: [],
				normal: [],
				colors: [],
				uvs: [],
				materialIndex: [],
				vertexWeights: [],
				weightsIndices: []
			};
			let polygonIndex = 0;
			let faceLength = 0;
			let displayedWeightsWarning = false; // these will hold data for a single face

			let facePositionIndexes = [];
			let faceNormals = [];
			let faceColors = [];
			let faceUVs = [];
			let faceWeights = [];
			let faceWeightIndices = [];
			const scope = this;
			geoInfo.vertexIndices.forEach(function (vertexIndex, polygonVertexIndex) {

				let materialIndex;
				let endOfFace = false; // Face index and vertex index arrays are combined in a single array
				// A cube with quad faces looks like this:
				// PolygonVertexIndex: *24 {
				//  a: 0, 1, 3, -3, 2, 3, 5, -5, 4, 5, 7, -7, 6, 7, 1, -1, 1, 7, 5, -4, 6, 0, 2, -5
				//  }
				// Negative numbers mark the end of a face - first face here is 0, 1, 3, -3
				// to find index of last vertex bit shift the index: ^ - 1

				if (vertexIndex < 0) {

					vertexIndex = vertexIndex ^ - 1; // equivalent to ( x * -1 ) - 1

					endOfFace = true;

				}

				let weightIndices = [];
				let weights = [];
				facePositionIndexes.push(vertexIndex * 3, vertexIndex * 3 + 1, vertexIndex * 3 + 2);

				if (geoInfo.color) {

					const data = getData(polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.color);
					faceColors.push(data[0], data[1], data[2]);

				}

				if (geoInfo.skeleton) {

					if (geoInfo.weightTable[vertexIndex] !== undefined) {

						geoInfo.weightTable[vertexIndex].forEach(function (wt) {

							weights.push(wt.weight);
							weightIndices.push(wt.id);

						});

					}

					if (weights.length > 4) {

						if (!displayedWeightsWarning) {

							console.warn('THREE.FBXLoader: Vertex has more than 4 skinning weights assigned to vertex. Deleting additional weights.');
							displayedWeightsWarning = true;

						}

						const wIndex = [0, 0, 0, 0];
						const Weight = [0, 0, 0, 0];
						weights.forEach(function (weight, weightIndex) {

							let currentWeight = weight;
							let currentIndex = weightIndices[weightIndex];
							Weight.forEach(function (comparedWeight, comparedWeightIndex, comparedWeightArray) {

								if (currentWeight > comparedWeight) {

									comparedWeightArray[comparedWeightIndex] = currentWeight;
									currentWeight = comparedWeight;
									const tmp = wIndex[comparedWeightIndex];
									wIndex[comparedWeightIndex] = currentIndex;
									currentIndex = tmp;

								}

							});

						});
						weightIndices = wIndex;
						weights = Weight;

					} // if the weight array is shorter than 4 pad with 0s


					while (weights.length < 4) {

						weights.push(0);
						weightIndices.push(0);

					}

					for (let i = 0; i < 4; ++i) {

						faceWeights.push(weights[i]);
						faceWeightIndices.push(weightIndices[i]);

					}

				}

				if (geoInfo.normal) {

					const data = getData(polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.normal);
					faceNormals.push(data[0], data[1], data[2]);

				}

				if (geoInfo.material && geoInfo.material.mappingType !== 'AllSame') {

					materialIndex = getData(polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.material)[0];

				}

				if (geoInfo.uv) {

					geoInfo.uv.forEach(function (uv, i) {

						const data = getData(polygonVertexIndex, polygonIndex, vertexIndex, uv);

						if (faceUVs[i] === undefined) {

							faceUVs[i] = [];

						}

						faceUVs[i].push(data[0]);
						faceUVs[i].push(data[1]);

					});

				}

				faceLength++;

				if (endOfFace) {

					scope.genFace(buffers, geoInfo, facePositionIndexes, materialIndex, faceNormals, faceColors, faceUVs, faceWeights, faceWeightIndices, faceLength);
					polygonIndex++;
					faceLength = 0; // reset arrays for the next face

					facePositionIndexes = [];
					faceNormals = [];
					faceColors = [];
					faceUVs = [];
					faceWeights = [];
					faceWeightIndices = [];

				}

			});
			return buffers;

		} // Generate data for a single face in a geometry. If the face is a quad then split it into 2 tris


		genFace(buffers, geoInfo, facePositionIndexes, materialIndex, faceNormals, faceColors, faceUVs, faceWeights, faceWeightIndices, faceLength) {

			for (let i = 2; i < faceLength; i++) {

				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[0]]);
				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[1]]);
				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[2]]);
				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[(i - 1) * 3]]);
				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[(i - 1) * 3 + 1]]);
				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[(i - 1) * 3 + 2]]);
				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i * 3]]);
				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i * 3 + 1]]);
				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i * 3 + 2]]);

				if (geoInfo.skeleton) {

					buffers.vertexWeights.push(faceWeights[0]);
					buffers.vertexWeights.push(faceWeights[1]);
					buffers.vertexWeights.push(faceWeights[2]);
					buffers.vertexWeights.push(faceWeights[3]);
					buffers.vertexWeights.push(faceWeights[(i - 1) * 4]);
					buffers.vertexWeights.push(faceWeights[(i - 1) * 4 + 1]);
					buffers.vertexWeights.push(faceWeights[(i - 1) * 4 + 2]);
					buffers.vertexWeights.push(faceWeights[(i - 1) * 4 + 3]);
					buffers.vertexWeights.push(faceWeights[i * 4]);
					buffers.vertexWeights.push(faceWeights[i * 4 + 1]);
					buffers.vertexWeights.push(faceWeights[i * 4 + 2]);
					buffers.vertexWeights.push(faceWeights[i * 4 + 3]);
					buffers.weightsIndices.push(faceWeightIndices[0]);
					buffers.weightsIndices.push(faceWeightIndices[1]);
					buffers.weightsIndices.push(faceWeightIndices[2]);
					buffers.weightsIndices.push(faceWeightIndices[3]);
					buffers.weightsIndices.push(faceWeightIndices[(i - 1) * 4]);
					buffers.weightsIndices.push(faceWeightIndices[(i - 1) * 4 + 1]);
					buffers.weightsIndices.push(faceWeightIndices[(i - 1) * 4 + 2]);
					buffers.weightsIndices.push(faceWeightIndices[(i - 1) * 4 + 3]);
					buffers.weightsIndices.push(faceWeightIndices[i * 4]);
					buffers.weightsIndices.push(faceWeightIndices[i * 4 + 1]);
					buffers.weightsIndices.push(faceWeightIndices[i * 4 + 2]);
					buffers.weightsIndices.push(faceWeightIndices[i * 4 + 3]);

				}

				if (geoInfo.color) {

					buffers.colors.push(faceColors[0]);
					buffers.colors.push(faceColors[1]);
					buffers.colors.push(faceColors[2]);
					buffers.colors.push(faceColors[(i - 1) * 3]);
					buffers.colors.push(faceColors[(i - 1) * 3 + 1]);
					buffers.colors.push(faceColors[(i - 1) * 3 + 2]);
					buffers.colors.push(faceColors[i * 3]);
					buffers.colors.push(faceColors[i * 3 + 1]);
					buffers.colors.push(faceColors[i * 3 + 2]);

				}

				if (geoInfo.material && geoInfo.material.mappingType !== 'AllSame') {

					buffers.materialIndex.push(materialIndex);
					buffers.materialIndex.push(materialIndex);
					buffers.materialIndex.push(materialIndex);

				}

				if (geoInfo.normal) {

					buffers.normal.push(faceNormals[0]);
					buffers.normal.push(faceNormals[1]);
					buffers.normal.push(faceNormals[2]);
					buffers.normal.push(faceNormals[(i - 1) * 3]);
					buffers.normal.push(faceNormals[(i - 1) * 3 + 1]);
					buffers.normal.push(faceNormals[(i - 1) * 3 + 2]);
					buffers.normal.push(faceNormals[i * 3]);
					buffers.normal.push(faceNormals[i * 3 + 1]);
					buffers.normal.push(faceNormals[i * 3 + 2]);

				}

				if (geoInfo.uv) {

					geoInfo.uv.forEach(function (uv, j) {

						if (buffers.uvs[j] === undefined) buffers.uvs[j] = [];
						buffers.uvs[j].push(faceUVs[j][0]);
						buffers.uvs[j].push(faceUVs[j][1]);
						buffers.uvs[j].push(faceUVs[j][(i - 1) * 2]);
						buffers.uvs[j].push(faceUVs[j][(i - 1) * 2 + 1]);
						buffers.uvs[j].push(faceUVs[j][i * 2]);
						buffers.uvs[j].push(faceUVs[j][i * 2 + 1]);

					});

				}

			}

		}

		addMorphTargets(parentGeo, parentGeoNode, morphTargets, preTransform) {

			if (morphTargets.length === 0) return;
			parentGeo.morphTargetsRelative = true;
			parentGeo.morphAttributes.position = []; // parentGeo.morphAttributes.normal = []; // not implemented

			const scope = this;
			morphTargets.forEach(function (morphTarget) {

				morphTarget.rawTargets.forEach(function (rawTarget) {

					const morphGeoNode = fbxTree.Objects.Geometry[rawTarget.geoID];

					if (morphGeoNode !== undefined) {

						scope.genMorphGeometry(parentGeo, parentGeoNode, morphGeoNode, preTransform, rawTarget.name);

					}

				});

			});

		} // a morph geometry node is similar to a standard  node, and the node is also contained
		// in FBXTree.Objects.Geometry, however it can only have attributes for position, normal
		// and a special attribute Index defining which vertices of the original geometry are affected
		// Normal and position attributes only have data for the vertices that are affected by the morph


		genMorphGeometry(parentGeo, parentGeoNode, morphGeoNode, preTransform, name) {

			const vertexIndices = parentGeoNode.PolygonVertexIndex !== undefined ? parentGeoNode.PolygonVertexIndex.a : [];
			const morphPositionsSparse = morphGeoNode.Vertices !== undefined ? morphGeoNode.Vertices.a : [];
			const indices = morphGeoNode.Indexes !== undefined ? morphGeoNode.Indexes.a : [];
			const length = parentGeo.attributes.position.count * 3;
			const morphPositions = new Float32Array(length);

			for (let i = 0; i < indices.length; i++) {

				const morphIndex = indices[i] * 3;
				morphPositions[morphIndex] = morphPositionsSparse[i * 3];
				morphPositions[morphIndex + 1] = morphPositionsSparse[i * 3 + 1];
				morphPositions[morphIndex + 2] = morphPositionsSparse[i * 3 + 2];

			} // TODO: add morph normal support


			const morphGeoInfo = {
				vertexIndices: vertexIndices,
				vertexPositions: morphPositions
			};
			const morphBuffers = this.genBuffers(morphGeoInfo);
			const positionAttribute = new THREE.Float32BufferAttribute(morphBuffers.vertex, 3);
			positionAttribute.name = name || morphGeoNode.attrName;
			positionAttribute.applyMatrix4(preTransform);
			parentGeo.morphAttributes.position.push(positionAttribute);

		} // Parse normal from FBXTree.Objects.Geometry.LayerElementNormal if it exists


		parseNormals(NormalNode) {

			const mappingType = NormalNode.MappingInformationType;
			const referenceType = NormalNode.ReferenceInformationType;
			const buffer = NormalNode.Normals.a;
			let indexBuffer = [];

			if (referenceType === 'IndexToDirect') {

				if ('NormalIndex' in NormalNode) {

					indexBuffer = NormalNode.NormalIndex.a;

				} else if ('NormalsIndex' in NormalNode) {

					indexBuffer = NormalNode.NormalsIndex.a;

				}

			}

			return {
				dataSize: 3,
				buffer: buffer,
				indices: indexBuffer,
				mappingType: mappingType,
				referenceType: referenceType
			};

		} // Parse UVs from FBXTree.Objects.Geometry.LayerElementUV if it exists


		parseUVs(UVNode) {

			const mappingType = UVNode.MappingInformationType;
			const referenceType = UVNode.ReferenceInformationType;
			const buffer = UVNode.UV.a;
			let indexBuffer = [];

			if (referenceType === 'IndexToDirect') {

				indexBuffer = UVNode.UVIndex.a;

			}

			return {
				dataSize: 2,
				buffer: buffer,
				indices: indexBuffer,
				mappingType: mappingType,
				referenceType: referenceType
			};

		} // Parse Vertex Colors from FBXTree.Objects.Geometry.LayerElementColor if it exists


		parseVertexColors(ColorNode) {

			const mappingType = ColorNode.MappingInformationType;
			const referenceType = ColorNode.ReferenceInformationType;
			const buffer = ColorNode.Colors.a;
			let indexBuffer = [];

			if (referenceType === 'IndexToDirect') {

				indexBuffer = ColorNode.ColorIndex.a;

			}

			return {
				dataSize: 4,
				buffer: buffer,
				indices: indexBuffer,
				mappingType: mappingType,
				referenceType: referenceType
			};

		} // Parse mapping and material data in FBXTree.Objects.Geometry.LayerElementMaterial if it exists


		parseMaterialIndices(MaterialNode) {

			const mappingType = MaterialNode.MappingInformationType;
			const referenceType = MaterialNode.ReferenceInformationType;

			if (mappingType === 'NoMappingInformation') {

				return {
					dataSize: 1,
					buffer: [0],
					indices: [0],
					mappingType: 'AllSame',
					referenceType: referenceType
				};

			}

			const materialIndexBuffer = MaterialNode.Materials.a; // Since materials are stored as indices, there's a bit of a mismatch between FBX and what
			// we expect.So we create an intermediate buffer that points to the index in the buffer,
			// for conforming with the other functions we've written for other data.

			const materialIndices = [];

			for (let i = 0; i < materialIndexBuffer.length; ++i) {

				materialIndices.push(i);

			}

			return {
				dataSize: 1,
				buffer: materialIndexBuffer,
				indices: materialIndices,
				mappingType: mappingType,
				referenceType: referenceType
			};

		} // Generate a NurbGeometry from a node in FBXTree.Objects.Geometry


		parseNurbsGeometry(geoNode) {

			if (THREE.NURBSCurve === undefined) {

				console.error('THREE.FBXLoader: The loader relies on THREE.NURBSCurve for any nurbs present in the model. Nurbs will show up as empty geometry.');
				return new THREE.BufferGeometry();

			}

			const order = parseInt(geoNode.Order);

			if (isNaN(order)) {

				console.error('THREE.FBXLoader: Invalid Order %s given for geometry ID: %s', geoNode.Order, geoNode.id);
				return new THREE.BufferGeometry();

			}

			const degree = order - 1;
			const knots = geoNode.KnotVector.a;
			const controlPoints = [];
			const pointsValues = geoNode.Points.a;

			for (let i = 0, l = pointsValues.length; i < l; i += 4) {

				controlPoints.push(new THREE.Vector4().fromArray(pointsValues, i));

			}

			let startKnot, endKnot;

			if (geoNode.Form === 'Closed') {

				controlPoints.push(controlPoints[0]);

			} else if (geoNode.Form === 'Periodic') {

				startKnot = degree;
				endKnot = knots.length - 1 - startKnot;

				for (let i = 0; i < degree; ++i) {

					controlPoints.push(controlPoints[i]);

				}

			}

			const curve = new THREE.NURBSCurve(degree, knots, controlPoints, startKnot, endKnot);
			const points = curve.getPoints(controlPoints.length * 12);
			return new THREE.BufferGeometry().setFromPoints(points);

		}

	} // parse animation data from FBXTree


	class AnimationParser {

		// take raw animation clips and turn them into three.js animation clips
		parse() {

			const animationClips = [];
			const rawClips = this.parseClips();

			if (rawClips !== undefined) {

				for (const key in rawClips) {

					const rawClip = rawClips[key];
					const clip = this.addClip(rawClip);
					animationClips.push(clip);

				}

			}

			return animationClips;

		}

		parseClips() {

			// since the actual transformation data is stored in FBXTree.Objects.AnimationCurve,
			// if this is undefined we can safely assume there are no animations
			if (fbxTree.Objects.AnimationCurve === undefined) return undefined;
			const curveNodesMap = this.parseAnimationCurveNodes();
			this.parseAnimationCurves(curveNodesMap);
			const layersMap = this.parseAnimationLayers(curveNodesMap);
			const rawClips = this.parseAnimStacks(layersMap);
			return rawClips;

		} // parse nodes in FBXTree.Objects.AnimationCurveNode
		// each AnimationCurveNode holds data for an animation transform for a model (e.g. left arm rotation )
		// and is referenced by an AnimationLayer


		parseAnimationCurveNodes() {

			const rawCurveNodes = fbxTree.Objects.AnimationCurveNode;
			const curveNodesMap = new Map();

			for (const nodeID in rawCurveNodes) {

				const rawCurveNode = rawCurveNodes[nodeID];

				if (rawCurveNode.attrName.match(/S|R|T|DeformPercent/) !== null) {

					const curveNode = {
						id: rawCurveNode.id,
						attr: rawCurveNode.attrName,
						curves: {}
					};
					curveNodesMap.set(curveNode.id, curveNode);

				}

			}

			return curveNodesMap;

		} // parse nodes in FBXTree.Objects.AnimationCurve and connect them up to
		// previously parsed AnimationCurveNodes. Each AnimationCurve holds data for a single animated
		// axis ( e.g. times and values of x rotation)


		parseAnimationCurves(curveNodesMap) {

			const rawCurves = fbxTree.Objects.AnimationCurve; // TODO: Many values are identical up to roundoff error, but won't be optimised
			// e.g. position times: [0, 0.4, 0. 8]
			// position values: [7.23538335023477e-7, 93.67518615722656, -0.9982695579528809, 7.23538335023477e-7, 93.67518615722656, -0.9982695579528809, 7.235384487103147e-7, 93.67520904541016, -0.9982695579528809]
			// clearly, this should be optimised to
			// times: [0], positions [7.23538335023477e-7, 93.67518615722656, -0.9982695579528809]
			// this shows up in nearly every FBX file, and generally time array is length > 100

			for (const nodeID in rawCurves) {

				const animationCurve = {
					id: rawCurves[nodeID].id,
					times: rawCurves[nodeID].KeyTime.a.map(convertFBXTimeToSeconds),
					values: rawCurves[nodeID].KeyValueFloat.a
				};
				const relationships = connections.get(animationCurve.id);

				if (relationships !== undefined) {

					const animationCurveID = relationships.parents[0].ID;
					const animationCurveRelationship = relationships.parents[0].relationship;

					if (animationCurveRelationship.match(/X/)) {

						curveNodesMap.get(animationCurveID).curves['x'] = animationCurve;

					} else if (animationCurveRelationship.match(/Y/)) {

						curveNodesMap.get(animationCurveID).curves['y'] = animationCurve;

					} else if (animationCurveRelationship.match(/Z/)) {

						curveNodesMap.get(animationCurveID).curves['z'] = animationCurve;

					} else if (animationCurveRelationship.match(/d|DeformPercent/) && curveNodesMap.has(animationCurveID)) {

						curveNodesMap.get(animationCurveID).curves['morph'] = animationCurve;

					}

				}

			}

		} // parse nodes in FBXTree.Objects.AnimationLayer. Each layers holds references
		// to various AnimationCurveNodes and is referenced by an AnimationStack node
		// note: theoretically a stack can have multiple layers, however in practice there always seems to be one per stack


		parseAnimationLayers(curveNodesMap) {

			const rawLayers = fbxTree.Objects.AnimationLayer;
			const layersMap = new Map();

			for (const nodeID in rawLayers) {

				const layerCurveNodes = [];
				const connection = connections.get(parseInt(nodeID));

				if (connection !== undefined) {

					// all the animationCurveNodes used in the layer
					const children = connection.children;
					children.forEach(function (child, i) {

						if (curveNodesMap.has(child.ID)) {

							const curveNode = curveNodesMap.get(child.ID); // check that the curves are defined for at least one axis, otherwise ignore the curveNode

							if (curveNode.curves.x !== undefined || curveNode.curves.y !== undefined || curveNode.curves.z !== undefined) {

								if (layerCurveNodes[i] === undefined) {

									const modelID = connections.get(child.ID).parents.filter(function (parent) {

										return parent.relationship !== undefined;

									})[0].ID;

									if (modelID !== undefined) {

										const rawModel = fbxTree.Objects.Model[modelID.toString()];

										if (rawModel === undefined) {

											console.warn('THREE.FBXLoader: Encountered a unused curve.', child);
											return;

										}

										const node = {
											modelName: rawModel.attrName ? THREE.PropertyBinding.sanitizeNodeName(rawModel.attrName) : '',
											ID: rawModel.id,
											initialPosition: [0, 0, 0],
											initialRotation: [0, 0, 0],
											initialScale: [1, 1, 1]
										};
										sceneGraph.traverse(function (child) {

											if (child.ID === rawModel.id) {

												node.transform = child.matrix;
												if (child.userData.transformData) node.eulerOrder = child.userData.transformData.eulerOrder;

											}

										});
										if (!node.transform) node.transform = new THREE.Matrix4(); // if the animated model is pre rotated, we'll have to apply the pre rotations to every
										// animation value as well

										if ('PreRotation' in rawModel) node.preRotation = rawModel.PreRotation.value;
										if ('PostRotation' in rawModel) node.postRotation = rawModel.PostRotation.value;
										layerCurveNodes[i] = node;

									}

								}

								if (layerCurveNodes[i]) layerCurveNodes[i][curveNode.attr] = curveNode;

							} else if (curveNode.curves.morph !== undefined) {

								if (layerCurveNodes[i] === undefined) {

									const deformerID = connections.get(child.ID).parents.filter(function (parent) {

										return parent.relationship !== undefined;

									})[0].ID;
									const morpherID = connections.get(deformerID).parents[0].ID;
									const geoID = connections.get(morpherID).parents[0].ID; // assuming geometry is not used in more than one model

									const modelID = connections.get(geoID).parents[0].ID;
									const rawModel = fbxTree.Objects.Model[modelID];
									const node = {
										modelName: rawModel.attrName ? THREE.PropertyBinding.sanitizeNodeName(rawModel.attrName) : '',
										morphName: fbxTree.Objects.Deformer[deformerID].attrName
									};
									layerCurveNodes[i] = node;

								}

								layerCurveNodes[i][curveNode.attr] = curveNode;

							}

						}

					});
					layersMap.set(parseInt(nodeID), layerCurveNodes);

				}

			}

			return layersMap;

		} // parse nodes in FBXTree.Objects.AnimationStack. These are the top level node in the animation
		// hierarchy. Each Stack node will be used to create a THREE.AnimationClip


		parseAnimStacks(layersMap) {

			const rawStacks = fbxTree.Objects.AnimationStack; // connect the stacks (clips) up to the layers

			const rawClips = {};

			for (const nodeID in rawStacks) {

				const children = connections.get(parseInt(nodeID)).children;

				if (children.length > 1) {

					// it seems like stacks will always be associated with a single layer. But just in case there are files
					// where there are multiple layers per stack, we'll display a warning
					console.warn('THREE.FBXLoader: Encountered an animation stack with multiple layers, this is currently not supported. Ignoring subsequent layers.');

				}

				const layer = layersMap.get(children[0].ID);
				rawClips[nodeID] = {
					name: rawStacks[nodeID].attrName,
					layer: layer
				};

			}

			return rawClips;

		}

		addClip(rawClip) {

			let tracks = [];
			const scope = this;
			rawClip.layer.forEach(function (rawTracks) {

				tracks = tracks.concat(scope.generateTracks(rawTracks));

			});
			return new THREE.AnimationClip(rawClip.name, - 1, tracks);

		}

		generateTracks(rawTracks) {

			const tracks = [];
			let initialPosition = new THREE.Vector3();
			let initialRotation = new THREE.Quaternion();
			let initialScale = new THREE.Vector3();
			if (rawTracks.transform) rawTracks.transform.decompose(initialPosition, initialRotation, initialScale);
			initialPosition = initialPosition.toArray();
			initialRotation = new THREE.Euler().setFromQuaternion(initialRotation, rawTracks.eulerOrder).toArray();
			initialScale = initialScale.toArray();

			if (rawTracks.T !== undefined && Object.keys(rawTracks.T.curves).length > 0) {

				const positionTrack = this.generateVectorTrack(rawTracks.modelName, rawTracks.T.curves, initialPosition, 'position');
				if (positionTrack !== undefined) tracks.push(positionTrack);

			}

			if (rawTracks.R !== undefined && Object.keys(rawTracks.R.curves).length > 0) {

				const rotationTrack = this.generateRotationTrack(rawTracks.modelName, rawTracks.R.curves, initialRotation, rawTracks.preRotation, rawTracks.postRotation, rawTracks.eulerOrder);
				if (rotationTrack !== undefined) tracks.push(rotationTrack);

			}

			if (rawTracks.S !== undefined && Object.keys(rawTracks.S.curves).length > 0) {

				const scaleTrack = this.generateVectorTrack(rawTracks.modelName, rawTracks.S.curves, initialScale, 'scale');
				if (scaleTrack !== undefined) tracks.push(scaleTrack);

			}

			if (rawTracks.DeformPercent !== undefined) {

				const morphTrack = this.generateMorphTrack(rawTracks);
				if (morphTrack !== undefined) tracks.push(morphTrack);

			}

			return tracks;

		}

		generateVectorTrack(modelName, curves, initialValue, type) {

			const times = this.getTimesForAllAxes(curves);
			const values = this.getKeyframeTrackValues(times, curves, initialValue);
			return new THREE.VectorKeyframeTrack(modelName + '.' + type, times, values);

		}

		generateRotationTrack(modelName, curves, initialValue, preRotation, postRotation, eulerOrder) {

			if (curves.x !== undefined) {

				this.interpolateRotations(curves.x);
				curves.x.values = curves.x.values.map(THREE.MathUtils.degToRad);

			}

			if (curves.y !== undefined) {

				this.interpolateRotations(curves.y);
				curves.y.values = curves.y.values.map(THREE.MathUtils.degToRad);

			}

			if (curves.z !== undefined) {

				this.interpolateRotations(curves.z);
				curves.z.values = curves.z.values.map(THREE.MathUtils.degToRad);

			}

			const times = this.getTimesForAllAxes(curves);
			const values = this.getKeyframeTrackValues(times, curves, initialValue);

			if (preRotation !== undefined) {

				preRotation = preRotation.map(THREE.MathUtils.degToRad);
				preRotation.push(eulerOrder);
				preRotation = new THREE.Euler().fromArray(preRotation);
				preRotation = new THREE.Quaternion().setFromEuler(preRotation);

			}

			if (postRotation !== undefined) {

				postRotation = postRotation.map(THREE.MathUtils.degToRad);
				postRotation.push(eulerOrder);
				postRotation = new THREE.Euler().fromArray(postRotation);
				postRotation = new THREE.Quaternion().setFromEuler(postRotation).invert();

			}

			const quaternion = new THREE.Quaternion();
			const euler = new THREE.Euler();
			const quaternionValues = [];

			for (let i = 0; i < values.length; i += 3) {

				euler.set(values[i], values[i + 1], values[i + 2], eulerOrder);
				quaternion.setFromEuler(euler);
				if (preRotation !== undefined) quaternion.premultiply(preRotation);
				if (postRotation !== undefined) quaternion.multiply(postRotation);
				quaternion.toArray(quaternionValues, i / 3 * 4);

			}

			return new THREE.QuaternionKeyframeTrack(modelName + '.quaternion', times, quaternionValues);

		}

		generateMorphTrack(rawTracks) {

			const curves = rawTracks.DeformPercent.curves.morph;
			const values = curves.values.map(function (val) {

				return val / 100;

			});
			const morphNum = sceneGraph.getObjectByName(rawTracks.modelName).morphTargetDictionary[rawTracks.morphName];
			return new THREE.NumberKeyframeTrack(rawTracks.modelName + '.morphTargetInfluences[' + morphNum + ']', curves.times, values);

		} // For all animated objects, times are defined separately for each axis
		// Here we'll combine the times into one sorted array without duplicates


		getTimesForAllAxes(curves) {

			let times = []; // first join together the times for each axis, if defined

			if (curves.x !== undefined) times = times.concat(curves.x.times);
			if (curves.y !== undefined) times = times.concat(curves.y.times);
			if (curves.z !== undefined) times = times.concat(curves.z.times); // then sort them

			times = times.sort(function (a, b) {

				return a - b;

			}); // and remove duplicates

			if (times.length > 1) {

				let targetIndex = 1;
				let lastValue = times[0];

				for (let i = 1; i < times.length; i++) {

					const currentValue = times[i];

					if (currentValue !== lastValue) {

						times[targetIndex] = currentValue;
						lastValue = currentValue;
						targetIndex++;

					}

				}

				times = times.slice(0, targetIndex);

			}

			return times;

		}

		getKeyframeTrackValues(times, curves, initialValue) {

			const prevValue = initialValue;
			const values = [];
			let xIndex = - 1;
			let yIndex = - 1;
			let zIndex = - 1;
			times.forEach(function (time) {

				if (curves.x) xIndex = curves.x.times.indexOf(time);
				if (curves.y) yIndex = curves.y.times.indexOf(time);
				if (curves.z) zIndex = curves.z.times.indexOf(time); // if there is an x value defined for this frame, use that

				if (xIndex !== - 1) {

					const xValue = curves.x.values[xIndex];
					values.push(xValue);
					prevValue[0] = xValue;

				} else {

					// otherwise use the x value from the previous frame
					values.push(prevValue[0]);

				}

				if (yIndex !== - 1) {

					const yValue = curves.y.values[yIndex];
					values.push(yValue);
					prevValue[1] = yValue;

				} else {

					values.push(prevValue[1]);

				}

				if (zIndex !== - 1) {

					const zValue = curves.z.values[zIndex];
					values.push(zValue);
					prevValue[2] = zValue;

				} else {

					values.push(prevValue[2]);

				}

			});
			return values;

		} // Rotations are defined as THREE.Euler angles which can have values  of any size
		// These will be converted to quaternions which don't support values greater than
		// PI, so we'll interpolate large rotations


		interpolateRotations(curve) {

			for (let i = 1; i < curve.values.length; i++) {

				const initialValue = curve.values[i - 1];
				const valuesSpan = curve.values[i] - initialValue;
				const absoluteSpan = Math.abs(valuesSpan);

				if (absoluteSpan >= 180) {

					const numSubIntervals = absoluteSpan / 180;
					const step = valuesSpan / numSubIntervals;
					let nextValue = initialValue + step;
					const initialTime = curve.times[i - 1];
					const timeSpan = curve.times[i] - initialTime;
					const interval = timeSpan / numSubIntervals;
					let nextTime = initialTime + interval;
					const interpolatedTimes = [];
					const interpolatedValues = [];

					while (nextTime < curve.times[i]) {

						interpolatedTimes.push(nextTime);
						nextTime += interval;
						interpolatedValues.push(nextValue);
						nextValue += step;

					}

					curve.times = inject(curve.times, i, interpolatedTimes);
					curve.values = inject(curve.values, i, interpolatedValues);

				}

			}

		}

	} // parse an FBX file in ASCII format


	class TextParser {

		getPrevNode() {

			return this.nodeStack[this.currentIndent - 2];

		}

		getCurrentNode() {

			return this.nodeStack[this.currentIndent - 1];

		}

		getCurrentProp() {

			return this.currentProp;

		}

		pushStack(node) {

			this.nodeStack.push(node);
			this.currentIndent += 1;

		}

		popStack() {

			this.nodeStack.pop();
			this.currentIndent -= 1;

		}

		setCurrentProp(val, name) {

			this.currentProp = val;
			this.currentPropName = name;

		}

		parse(text) {

			this.currentIndent = 0;
			this.allNodes = new FBXTree();
			this.nodeStack = [];
			this.currentProp = [];
			this.currentPropName = '';
			const scope = this;
			const split = text.split(/[\r\n]+/);
			split.forEach(function (line, i) {

				const matchComment = line.match(/^[\s\t]*;/);
				const matchEmpty = line.match(/^[\s\t]*$/);
				if (matchComment || matchEmpty) return;
				const matchBeginning = line.match('^\\t{' + scope.currentIndent + '}(\\w+):(.*){', '');
				const matchProperty = line.match('^\\t{' + scope.currentIndent + '}(\\w+):[\\s\\t\\r\\n](.*)');
				const matchEnd = line.match('^\\t{' + (scope.currentIndent - 1) + '}}');

				if (matchBeginning) {

					scope.parseNodeBegin(line, matchBeginning);

				} else if (matchProperty) {

					scope.parseNodeProperty(line, matchProperty, split[++i]);

				} else if (matchEnd) {

					scope.popStack();

				} else if (line.match(/^[^\s\t}]/)) {

					// large arrays are split over multiple lines terminated with a ',' character
					// if this is encountered the line needs to be joined to the previous line
					scope.parseNodePropertyContinued(line);

				}

			});
			return this.allNodes;

		}

		parseNodeBegin(line, property) {

			const nodeName = property[1].trim().replace(/^"/, '').replace(/"$/, '');
			const nodeAttrs = property[2].split(',').map(function (attr) {

				return attr.trim().replace(/^"/, '').replace(/"$/, '');

			});
			const node = {
				name: nodeName
			};
			const attrs = this.parseNodeAttr(nodeAttrs);
			const currentNode = this.getCurrentNode(); // a top node

			if (this.currentIndent === 0) {

				this.allNodes.add(nodeName, node);

			} else {

				// a subnode
				// if the subnode already exists, append it
				if (nodeName in currentNode) {

					// special case Pose needs PoseNodes as an array
					if (nodeName === 'PoseNode') {

						currentNode.PoseNode.push(node);

					} else if (currentNode[nodeName].id !== undefined) {

						currentNode[nodeName] = {};
						currentNode[nodeName][currentNode[nodeName].id] = currentNode[nodeName];

					}

					if (attrs.id !== '') currentNode[nodeName][attrs.id] = node;

				} else if (typeof attrs.id === 'number') {

					currentNode[nodeName] = {};
					currentNode[nodeName][attrs.id] = node;

				} else if (nodeName !== 'Properties70') {

					if (nodeName === 'PoseNode') currentNode[nodeName] = [node]; else currentNode[nodeName] = node;

				}

			}

			if (typeof attrs.id === 'number') node.id = attrs.id;
			if (attrs.name !== '') node.attrName = attrs.name;
			if (attrs.type !== '') node.attrType = attrs.type;
			this.pushStack(node);

		}

		parseNodeAttr(attrs) {

			let id = attrs[0];

			if (attrs[0] !== '') {

				id = parseInt(attrs[0]);

				if (isNaN(id)) {

					id = attrs[0];

				}

			}

			let name = '',
				type = '';

			if (attrs.length > 1) {

				name = attrs[1].replace(/^(\w+)::/, '');
				type = attrs[2];

			}

			return {
				id: id,
				name: name,
				type: type
			};

		}

		parseNodeProperty(line, property, contentLine) {

			let propName = property[1].replace(/^"/, '').replace(/"$/, '').trim();
			let propValue = property[2].replace(/^"/, '').replace(/"$/, '').trim(); // for special case: base64 image data follows "Content: ," line
			//	Content: ,
			//	 "/9j/4RDaRXhpZgAATU0A..."

			if (propName === 'Content' && propValue === ',') {

				propValue = contentLine.replace(/"/g, '').replace(/,$/, '').trim();

			}

			const currentNode = this.getCurrentNode();
			const parentName = currentNode.name;

			if (parentName === 'Properties70') {

				this.parseNodeSpecialProperty(line, propName, propValue);
				return;

			} // Connections


			if (propName === 'C') {

				const connProps = propValue.split(',').slice(1);
				const from = parseInt(connProps[0]);
				const to = parseInt(connProps[1]);
				let rest = propValue.split(',').slice(3);
				rest = rest.map(function (elem) {

					return elem.trim().replace(/^"/, '');

				});
				propName = 'connections';
				propValue = [from, to];
				append(propValue, rest);

				if (currentNode[propName] === undefined) {

					currentNode[propName] = [];

				}

			} // Node


			if (propName === 'Node') currentNode.id = propValue; // connections

			if (propName in currentNode && Array.isArray(currentNode[propName])) {

				currentNode[propName].push(propValue);

			} else {

				if (propName !== 'a') currentNode[propName] = propValue; else currentNode.a = propValue;

			}

			this.setCurrentProp(currentNode, propName); // convert string to array, unless it ends in ',' in which case more will be added to it

			if (propName === 'a' && propValue.slice(- 1) !== ',') {

				currentNode.a = parseNumberArray(propValue);

			}

		}

		parseNodePropertyContinued(line) {

			const currentNode = this.getCurrentNode();
			currentNode.a += line; // if the line doesn't end in ',' we have reached the end of the property value
			// so convert the string to an array

			if (line.slice(- 1) !== ',') {

				currentNode.a = parseNumberArray(currentNode.a);

			}

		} // parse "Property70"


		parseNodeSpecialProperty(line, propName, propValue) {

			// split this
			// P: "Lcl Scaling", "Lcl Scaling", "", "A",1,1,1
			// into array like below
			// ["Lcl Scaling", "Lcl Scaling", "", "A", "1,1,1" ]
			const props = propValue.split('",').map(function (prop) {

				return prop.trim().replace(/^\"/, '').replace(/\s/, '_');

			});
			const innerPropName = props[0];
			const innerPropType1 = props[1];
			const innerPropType2 = props[2];
			const innerPropFlag = props[3];
			let innerPropValue = props[4]; // cast values where needed, otherwise leave as strings

			switch (innerPropType1) {

				case 'int':
				case 'enum':
				case 'bool':
				case 'ULongLong':
				case 'double':
				case 'Number':
				case 'FieldOfView':
					innerPropValue = parseFloat(innerPropValue);
					break;

				case 'Color':
				case 'ColorRGB':
				case 'Vector3D':
				case 'Lcl_Translation':
				case 'Lcl_Rotation':
				case 'Lcl_Scaling':
					innerPropValue = parseNumberArray(innerPropValue);
					break;

			} // CAUTION: these props must append to parent's parent


			this.getPrevNode()[innerPropName] = {
				'type': innerPropType1,
				'type2': innerPropType2,
				'flag': innerPropFlag,
				'value': innerPropValue
			};
			this.setCurrentProp(this.getPrevNode(), innerPropName);

		}

	} // Parse an FBX file in Binary format


	class BinaryParser {

		parse(buffer) {

			const reader = new BinaryReader(buffer);
			reader.skip(23); // skip magic 23 bytes

			const version = reader.getUint32();

			if (version < 6400) {

				throw new Error('THREE.FBXLoader: FBX version not supported, FileVersion: ' + version);

			}

			const allNodes = new FBXTree();

			while (!this.endOfContent(reader)) {

				const node = this.parseNode(reader, version);
				if (node !== null) allNodes.add(node.name, node);

			}

			return allNodes;

		} // Check if reader has reached the end of content.


		endOfContent(reader) {

			// footer size: 160bytes + 16-byte alignment padding
			// - 16bytes: magic
			// - padding til 16-byte alignment (at least 1byte?)
			//	(seems like some exporters embed fixed 15 or 16bytes?)
			// - 4bytes: magic
			// - 4bytes: version
			// - 120bytes: zero
			// - 16bytes: magic
			if (reader.size() % 16 === 0) {

				return (reader.getOffset() + 160 + 16 & ~0xf) >= reader.size();

			} else {

				return reader.getOffset() + 160 + 16 >= reader.size();

			}

		} // recursively parse nodes until the end of the file is reached


		parseNode(reader, version) {

			const node = {}; // The first three data sizes depends on version.

			const endOffset = version >= 7500 ? reader.getUint64() : reader.getUint32();
			const numProperties = version >= 7500 ? reader.getUint64() : reader.getUint32();
			version >= 7500 ? reader.getUint64() : reader.getUint32(); // the returned propertyListLen is not used

			const nameLen = reader.getUint8();
			const name = reader.getString(nameLen); // Regards this node as NULL-record if endOffset is zero

			if (endOffset === 0) return null;
			const propertyList = [];

			for (let i = 0; i < numProperties; i++) {

				propertyList.push(this.parseProperty(reader));

			} // Regards the first three elements in propertyList as id, attrName, and attrType


			const id = propertyList.length > 0 ? propertyList[0] : '';
			const attrName = propertyList.length > 1 ? propertyList[1] : '';
			const attrType = propertyList.length > 2 ? propertyList[2] : ''; // check if this node represents just a single property
			// like (name, 0) set or (name2, [0, 1, 2]) set of {name: 0, name2: [0, 1, 2]}

			node.singleProperty = numProperties === 1 && reader.getOffset() === endOffset ? true : false;

			while (endOffset > reader.getOffset()) {

				const subNode = this.parseNode(reader, version);
				if (subNode !== null) this.parseSubNode(name, node, subNode);

			}

			node.propertyList = propertyList; // raw property list used by parent

			if (typeof id === 'number') node.id = id;
			if (attrName !== '') node.attrName = attrName;
			if (attrType !== '') node.attrType = attrType;
			if (name !== '') node.name = name;
			return node;

		}

		parseSubNode(name, node, subNode) {

			// special case: child node is single property
			if (subNode.singleProperty === true) {

				const value = subNode.propertyList[0];

				if (Array.isArray(value)) {

					node[subNode.name] = subNode;
					subNode.a = value;

				} else {

					node[subNode.name] = value;

				}

			} else if (name === 'Connections' && subNode.name === 'C') {

				const array = [];
				subNode.propertyList.forEach(function (property, i) {

					// first Connection is FBX type (OO, OP, etc.). We'll discard these
					if (i !== 0) array.push(property);

				});

				if (node.connections === undefined) {

					node.connections = [];

				}

				node.connections.push(array);

			} else if (subNode.name === 'Properties70') {

				const keys = Object.keys(subNode);
				keys.forEach(function (key) {

					node[key] = subNode[key];

				});

			} else if (name === 'Properties70' && subNode.name === 'P') {

				let innerPropName = subNode.propertyList[0];
				let innerPropType1 = subNode.propertyList[1];
				const innerPropType2 = subNode.propertyList[2];
				const innerPropFlag = subNode.propertyList[3];
				let innerPropValue;
				if (innerPropName.indexOf('Lcl ') === 0) innerPropName = innerPropName.replace('Lcl ', 'Lcl_');
				if (innerPropType1.indexOf('Lcl ') === 0) innerPropType1 = innerPropType1.replace('Lcl ', 'Lcl_');

				if (innerPropType1 === 'Color' || innerPropType1 === 'ColorRGB' || innerPropType1 === 'Vector' || innerPropType1 === 'Vector3D' || innerPropType1.indexOf('Lcl_') === 0) {

					innerPropValue = [subNode.propertyList[4], subNode.propertyList[5], subNode.propertyList[6]];

				} else {

					innerPropValue = subNode.propertyList[4];

				} // this will be copied to parent, see above


				node[innerPropName] = {
					'type': innerPropType1,
					'type2': innerPropType2,
					'flag': innerPropFlag,
					'value': innerPropValue
				};

			} else if (node[subNode.name] === undefined) {

				if (typeof subNode.id === 'number') {

					node[subNode.name] = {};
					node[subNode.name][subNode.id] = subNode;

				} else {

					node[subNode.name] = subNode;

				}

			} else {

				if (subNode.name === 'PoseNode') {

					if (!Array.isArray(node[subNode.name])) {

						node[subNode.name] = [node[subNode.name]];

					}

					node[subNode.name].push(subNode);

				} else if (node[subNode.name][subNode.id] === undefined) {

					node[subNode.name][subNode.id] = subNode;

				}

			}

		}

		parseProperty(reader) {

			const type = reader.getString(1);
			let length;

			switch (type) {

				case 'C':
					return reader.getBoolean();

				case 'D':
					return reader.getFloat64();

				case 'F':
					return reader.getFloat32();

				case 'I':
					return reader.getInt32();

				case 'L':
					return reader.getInt64();

				case 'R':
					length = reader.getUint32();
					return reader.getArrayBuffer(length);

				case 'S':
					length = reader.getUint32();
					return reader.getString(length);

				case 'Y':
					return reader.getInt16();

				case 'b':
				case 'c':
				case 'd':
				case 'f':
				case 'i':
				case 'l':
					const arrayLength = reader.getUint32();
					const encoding = reader.getUint32(); // 0: non-compressed, 1: compressed

					const compressedLength = reader.getUint32();

					if (encoding === 0) {

						switch (type) {

							case 'b':
							case 'c':
								return reader.getBooleanArray(arrayLength);

							case 'd':
								return reader.getFloat64Array(arrayLength);

							case 'f':
								return reader.getFloat32Array(arrayLength);

							case 'i':
								return reader.getInt32Array(arrayLength);

							case 'l':
								return reader.getInt64Array(arrayLength);

						}

					}

					if (typeof fflate === 'undefined') {

						console.error('THREE.FBXLoader: External library fflate.min.js required.');

					}

					const data = fflate.unzlibSync(new Uint8Array(reader.getArrayBuffer(compressedLength))); // eslint-disable-line no-undef

					const reader2 = new BinaryReader(data.buffer);

					switch (type) {

						case 'b':
						case 'c':
							return reader2.getBooleanArray(arrayLength);

						case 'd':
							return reader2.getFloat64Array(arrayLength);

						case 'f':
							return reader2.getFloat32Array(arrayLength);

						case 'i':
							return reader2.getInt32Array(arrayLength);

						case 'l':
							return reader2.getInt64Array(arrayLength);

					}

				default:
					throw new Error('THREE.FBXLoader: Unknown property type ' + type);

			}

		}

	}

	class BinaryReader {

		constructor(buffer, littleEndian) {

			this.dv = new DataView(buffer);
			this.offset = 0;
			this.littleEndian = littleEndian !== undefined ? littleEndian : true;

		}

		getOffset() {

			return this.offset;

		}

		size() {

			return this.dv.buffer.byteLength;

		}

		skip(length) {

			this.offset += length;

		} // seems like true/false representation depends on exporter.
		// true: 1 or 'Y'(=0x59), false: 0 or 'T'(=0x54)
		// then sees LSB.


		getBoolean() {

			return (this.getUint8() & 1) === 1;

		}

		getBooleanArray(size) {

			const a = [];

			for (let i = 0; i < size; i++) {

				a.push(this.getBoolean());

			}

			return a;

		}

		getUint8() {

			const value = this.dv.getUint8(this.offset);
			this.offset += 1;
			return value;

		}

		getInt16() {

			const value = this.dv.getInt16(this.offset, this.littleEndian);
			this.offset += 2;
			return value;

		}

		getInt32() {

			const value = this.dv.getInt32(this.offset, this.littleEndian);
			this.offset += 4;
			return value;

		}

		getInt32Array(size) {

			const a = [];

			for (let i = 0; i < size; i++) {

				a.push(this.getInt32());

			}

			return a;

		}

		getUint32() {

			const value = this.dv.getUint32(this.offset, this.littleEndian);
			this.offset += 4;
			return value;

		} // JavaScript doesn't support 64-bit integer so calculate this here
		// 1 << 32 will return 1 so using multiply operation instead here.
		// There's a possibility that this method returns wrong value if the value
		// is out of the range between Number.MAX_SAFE_INTEGER and Number.MIN_SAFE_INTEGER.
		// TODO: safely handle 64-bit integer


		getInt64() {

			let low, high;

			if (this.littleEndian) {

				low = this.getUint32();
				high = this.getUint32();

			} else {

				high = this.getUint32();
				low = this.getUint32();

			} // calculate negative value


			if (high & 0x80000000) {

				high = ~high & 0xFFFFFFFF;
				low = ~low & 0xFFFFFFFF;
				if (low === 0xFFFFFFFF) high = high + 1 & 0xFFFFFFFF;
				low = low + 1 & 0xFFFFFFFF;
				return - (high * 0x100000000 + low);

			}

			return high * 0x100000000 + low;

		}

		getInt64Array(size) {

			const a = [];

			for (let i = 0; i < size; i++) {

				a.push(this.getInt64());

			}

			return a;

		} // Note: see getInt64() comment


		getUint64() {

			let low, high;

			if (this.littleEndian) {

				low = this.getUint32();
				high = this.getUint32();

			} else {

				high = this.getUint32();
				low = this.getUint32();

			}

			return high * 0x100000000 + low;

		}

		getFloat32() {

			const value = this.dv.getFloat32(this.offset, this.littleEndian);
			this.offset += 4;
			return value;

		}

		getFloat32Array(size) {

			const a = [];

			for (let i = 0; i < size; i++) {

				a.push(this.getFloat32());

			}

			return a;

		}

		getFloat64() {

			const value = this.dv.getFloat64(this.offset, this.littleEndian);
			this.offset += 8;
			return value;

		}

		getFloat64Array(size) {

			const a = [];

			for (let i = 0; i < size; i++) {

				a.push(this.getFloat64());

			}

			return a;

		}

		getArrayBuffer(size) {

			const value = this.dv.buffer.slice(this.offset, this.offset + size);
			this.offset += size;
			return value;

		}

		getString(size) {

			// note: safari 9 doesn't support Uint8Array.indexOf; create intermediate array instead
			let a = [];

			for (let i = 0; i < size; i++) {

				a[i] = this.getUint8();

			}

			const nullByte = a.indexOf(0);
			if (nullByte >= 0) a = a.slice(0, nullByte);
			return THREE.LoaderUtils.decodeText(new Uint8Array(a));

		}

	} // FBXTree holds a representation of the FBX data, returned by the TextParser ( FBX ASCII format)
	// and BinaryParser( FBX Binary format)


	class FBXTree {

		add(key, val) {

			this[key] = val;

		}

	} // ************** UTILITY FUNCTIONS **************


	function isFbxFormatBinary(buffer) {

		const CORRECT = 'Kaydara\u0020FBX\u0020Binary\u0020\u0020\0';
		return buffer.byteLength >= CORRECT.length && CORRECT === convertArrayBufferToString(buffer, 0, CORRECT.length);

	}

	function isFbxFormatASCII(text) {

		const CORRECT = ['K', 'a', 'y', 'd', 'a', 'r', 'a', '\\', 'F', 'B', 'X', '\\', 'B', 'i', 'n', 'a', 'r', 'y', '\\', '\\'];
		let cursor = 0;

		function read(offset) {

			const result = text[offset - 1];
			text = text.slice(cursor + offset);
			cursor++;
			return result;

		}

		for (let i = 0; i < CORRECT.length; ++i) {

			const num = read(1);

			if (num === CORRECT[i]) {

				return false;

			}

		}

		return true;

	}

	function getFbxVersion(text) {

		const versionRegExp = /FBXVersion: (\d+)/;
		const match = text.match(versionRegExp);

		if (match) {

			const version = parseInt(match[1]);
			return version;

		}

		throw new Error('THREE.FBXLoader: Cannot find the version number for the file given.');

	} // Converts FBX ticks into real time seconds.


	function convertFBXTimeToSeconds(time) {

		return time / 46186158000;

	}

	const dataArray = []; // extracts the data from the correct position in the FBX array based on indexing type

	function getData(polygonVertexIndex, polygonIndex, vertexIndex, infoObject) {

		let index;

		switch (infoObject.mappingType) {

			case 'ByPolygonVertex':
				index = polygonVertexIndex;
				break;

			case 'ByPolygon':
				index = polygonIndex;
				break;

			case 'ByVertice':
				index = vertexIndex;
				break;

			case 'AllSame':
				index = infoObject.indices[0];
				break;

			default:
				console.warn('THREE.FBXLoader: unknown attribute mapping type ' + infoObject.mappingType);

		}

		if (infoObject.referenceType === 'IndexToDirect') index = infoObject.indices[index];
		const from = index * infoObject.dataSize;
		const to = from + infoObject.dataSize;
		return slice(dataArray, infoObject.buffer, from, to);

	}

	const tempEuler = new THREE.Euler();
	const tempVec = new THREE.Vector3(); // generate transformation from FBX transform data
	// ref: https://help.autodesk.com/view/FBX/2017/ENU/?guid=__files_GUID_10CDD63C_79C1_4F2D_BB28_AD2BE65A02ED_htm
	// ref: http://docs.autodesk.com/FBX/2014/ENU/FBX-SDK-Documentation/index.html?url=cpp_ref/_transformations_2main_8cxx-example.html,topicNumber=cpp_ref__transformations_2main_8cxx_example_htmlfc10a1e1-b18d-4e72-9dc0-70d0f1959f5e

	function generateTransform(transformData) {

		const lTranslationM = new THREE.Matrix4();
		const lPreRotationM = new THREE.Matrix4();
		const lRotationM = new THREE.Matrix4();
		const lPostRotationM = new THREE.Matrix4();
		const lScalingM = new THREE.Matrix4();
		const lScalingPivotM = new THREE.Matrix4();
		const lScalingOffsetM = new THREE.Matrix4();
		const lRotationOffsetM = new THREE.Matrix4();
		const lRotationPivotM = new THREE.Matrix4();
		const lParentGX = new THREE.Matrix4();
		const lParentLX = new THREE.Matrix4();
		const lGlobalT = new THREE.Matrix4();
		const inheritType = transformData.inheritType ? transformData.inheritType : 0;
		if (transformData.translation) lTranslationM.setPosition(tempVec.fromArray(transformData.translation));

		if (transformData.preRotation) {

			const array = transformData.preRotation.map(THREE.MathUtils.degToRad);
			array.push(transformData.eulerOrder);
			lPreRotationM.makeRotationFromEuler(tempEuler.fromArray(array));

		}

		if (transformData.rotation) {

			const array = transformData.rotation.map(THREE.MathUtils.degToRad);
			array.push(transformData.eulerOrder);
			lRotationM.makeRotationFromEuler(tempEuler.fromArray(array));

		}

		if (transformData.postRotation) {

			const array = transformData.postRotation.map(THREE.MathUtils.degToRad);
			array.push(transformData.eulerOrder);
			lPostRotationM.makeRotationFromEuler(tempEuler.fromArray(array));
			lPostRotationM.invert();

		}

		if (transformData.scale) lScalingM.scale(tempVec.fromArray(transformData.scale)); // Pivots and offsets

		if (transformData.scalingOffset) lScalingOffsetM.setPosition(tempVec.fromArray(transformData.scalingOffset));
		if (transformData.scalingPivot) lScalingPivotM.setPosition(tempVec.fromArray(transformData.scalingPivot));
		if (transformData.rotationOffset) lRotationOffsetM.setPosition(tempVec.fromArray(transformData.rotationOffset));
		if (transformData.rotationPivot) lRotationPivotM.setPosition(tempVec.fromArray(transformData.rotationPivot)); // parent transform

		if (transformData.parentMatrixWorld) {

			lParentLX.copy(transformData.parentMatrix);
			lParentGX.copy(transformData.parentMatrixWorld);

		}

		const lLRM = lPreRotationM.clone().multiply(lRotationM).multiply(lPostRotationM); // Global Rotation

		const lParentGRM = new THREE.Matrix4();
		lParentGRM.extractRotation(lParentGX); // Global Shear*Scaling

		const lParentTM = new THREE.Matrix4();
		lParentTM.copyPosition(lParentGX);
		const lParentGRSM = lParentTM.clone().invert().multiply(lParentGX);
		const lParentGSM = lParentGRM.clone().invert().multiply(lParentGRSM);
		const lLSM = lScalingM;
		const lGlobalRS = new THREE.Matrix4();

		if (inheritType === 0) {

			lGlobalRS.copy(lParentGRM).multiply(lLRM).multiply(lParentGSM).multiply(lLSM);

		} else if (inheritType === 1) {

			lGlobalRS.copy(lParentGRM).multiply(lParentGSM).multiply(lLRM).multiply(lLSM);

		} else {

			const lParentLSM = new THREE.Matrix4().scale(new THREE.Vector3().setFromMatrixScale(lParentLX));
			const lParentLSM_inv = lParentLSM.clone().invert();
			const lParentGSM_noLocal = lParentGSM.clone().multiply(lParentLSM_inv);
			lGlobalRS.copy(lParentGRM).multiply(lLRM).multiply(lParentGSM_noLocal).multiply(lLSM);

		}

		const lRotationPivotM_inv = lRotationPivotM.clone().invert();
		const lScalingPivotM_inv = lScalingPivotM.clone().invert(); // Calculate the local transform matrix

		let lTransform = lTranslationM.clone().multiply(lRotationOffsetM).multiply(lRotationPivotM).multiply(lPreRotationM).multiply(lRotationM).multiply(lPostRotationM).multiply(lRotationPivotM_inv).multiply(lScalingOffsetM).multiply(lScalingPivotM).multiply(lScalingM).multiply(lScalingPivotM_inv);
		const lLocalTWithAllPivotAndOffsetInfo = new THREE.Matrix4().copyPosition(lTransform);
		const lGlobalTranslation = lParentGX.clone().multiply(lLocalTWithAllPivotAndOffsetInfo);
		lGlobalT.copyPosition(lGlobalTranslation);
		lTransform = lGlobalT.clone().multiply(lGlobalRS); // from global to local

		lTransform.premultiply(lParentGX.invert());
		return lTransform;

	} // Returns the three.js intrinsic THREE.Euler order corresponding to FBX extrinsic THREE.Euler order
	// ref: http://help.autodesk.com/view/FBX/2017/ENU/?guid=__cpp_ref_class_fbx_euler_html


	function getEulerOrder(order) {

		order = order || 0;
		const enums = ['ZYX', // -> XYZ extrinsic
			'YZX', // -> XZY extrinsic
			'XZY', // -> YZX extrinsic
			'ZXY', // -> YXZ extrinsic
			'YXZ', // -> ZXY extrinsic
			'XYZ' // -> ZYX extrinsic
			//'SphericXYZ', // not possible to support
		];

		if (order === 6) {

			console.warn('THREE.FBXLoader: unsupported THREE.Euler Order: Spherical XYZ. Animations and rotations may be incorrect.');
			return enums[0];

		}

		return enums[order];

	} // Parses comma separated list of numbers and returns them an array.
	// Used internally by the TextParser


	function parseNumberArray(value) {

		const array = value.split(',').map(function (val) {

			return parseFloat(val);

		});
		return array;

	}

	function convertArrayBufferToString(buffer, from, to) {

		if (from === undefined) from = 0;
		if (to === undefined) to = buffer.byteLength;
		return THREE.LoaderUtils.decodeText(new Uint8Array(buffer, from, to));

	}

	function append(a, b) {

		for (let i = 0, j = a.length, l = b.length; i < l; i++, j++) {

			a[j] = b[i];

		}

	}

	function slice(a, b, from, to) {

		for (let i = from, j = 0; i < to; i++, j++) {

			a[j] = b[i];

		}

		return a;

	} // inject array a2 into array a1 at index


	function inject(a1, index, a2) {

		return a1.slice(0, index).concat(a2).concat(a1.slice(index));

	}

	THREE.FBXLoader = FBXLoader;

})();

module.exports = exports = THREE.FBXLoader;
